Hot-air heating system



Sept. 11, 1928. 1,684,044

L; SKELDING HOT AIR HEATING SYSTEM Filed April 1927 2 Sheets-Sheet 1 NVEN TOR Lo w s SKELDING 'A TT'ORNFYS Patented Sept. 11, 1928.

. UNITE-D ,sTA E-s ATENT QFF- C I LOUIS SKELDING, OF VANGOUVER, BRITISH COLUMBIA, CANADA.

HOT-AIR HEATING sYs'rnM.

Application filed April 5,

My invention relates to improvements in hot air heating systems and has for its objects the provision'of means for promoting more perfect combustion in the fire pot than is common in systems now installed; for

Washing the air supply for the system; to provide ample water for evaporation, to again wash the air prior to its return to the furnace casingytoprovide awater supply system v by means of which great water economy is effected. A further object is to disposesome of the hot air ducts within the coldair ducts so that economy of space'is effected and cold air registers can bev con- .ence indicate corresponding parts in each,

figure.

' The numeral 1 indicates generally a furnace having an? ash pit 2, a fire pot 3, a dome 4 and a radiator 5.v The ash pit is provided with an ash door 6 and the dome with a feed door 7 anda. feed passagel8,

in the usual manner. At thebase of the fire pot 3 is a set of grate bars'tl of rocking or any other suitable. type. The radiator 5 consists of a central .cylindrical, portion 10, which is adaptedto rest upon the dome 4, and which supports an annular smoke passage 11 with which it communicates through V a. radial passage 12. The annular passage is provided with a secondary inlet 13 which connects with a smoke manifold 14 leading from the side wall of thedome4 and has a smoke outlet 15 to which a smoke header 16 is attached. A transversewall 17 is providediwithin the passage 11 for the purpose '01 causing the smoke from the dome to flow throughout the entire length of the passage to'the smoke outlet. Depending from the outer end. of, the smoke manifold 14 is a combustion chamber 18, see ,Figure 3, in which a gas ring 19 having a supply P1176 and valve 20 is fitted, sothat the furnace 1927. vserial No. 181,164.

may be heated with a gas flame therefrom if. desired,"or the usual firing with wood or coal inthe iire pot 3 be augmented by the gas ring 19 to provide heat against unduly low external temperatures. As a means for promoting'complete combustion and also to prevent the explosion of coal gases emitted from a freshly stoked coal fire, I provide an air ring generally indicated by the numeral 21 at the intersection of the dome 4 and the cylindrical portion 10 of theradiator 5, which ring is supplied with air from the outside of, the furnace case through a pipe 22having' a control damper 23 at its outer end. The ring 21 is provided with a plurality of orifices 24 on its underside to direct the incoming air downwards that it may mix freely with the gas laden smoke rising from the fire pot and render it combustible. A tubular transverse member 25 connects the opposite sides of the ring together and is fittedwith a downwardly directed pipe 26 having a bell shaped open end 27 which extends. an appreciable distance towards the top of the-fire pot 3. At the intersection of the dome 4 and the smoke manifold 14, v

also'at the intersection of the radiator smoke outlet-15 fromthe radiator 5 and the smoke header 16,. are further air rings 28 and 29 respectively, whichare preferably similari to the ring 21, though-I may prefer to omit therefrom the tubular transverse member 25 and the pipe '26. The air rings 28 and 29 are fitted with. air intake pipes .30 each hav- 'a suitable control damper 31. Communicating-with the smoke header 16 is a casing 32 having a bottom outlet 33 and a verticaldividing plate. 34 defining down and updraught passages 35 and SG respectively which communicate with each other atvboth lower and upper ends. As a means for directing the smoke through these passages a damper 37 is fitted in the smoke header '16 and is adapted to close against the upper extremity of the dividing plate The, parts thus-far described with the ex 1' ception of course the control dampers to the air rings 21, 28 and 29, are enclosed with m a furnace casing 38 which is detachably held in position and abuts, at its upper ex-- tremity, against an annular ring 39.which is preferably suspended from the furnace room ceiling by bolts 40. smoke pipe 41' leading to a suitable fine is connected to the smoke header lfi which is provided; adjacent rthe I ing.

furnace casing with a vertical branch 42 fitted with a damper 43 intermediate its length and having a bend or T44 at its lower extremity which is fitted with a check door 45. The smoke outlet 33 intersects and communicates with the branch 42 and is provided with a hinged door 46 as a means for affording access to a removable screen 47 therein. The casing 38 is fitted with a can opy 48 which is carried upon the annular ring 39 and is fitted with a plurality of hot air pipes 49 leading to the rooms to be heated. Some of said hot air pipes may be enclosed within return or cold air pipes 50 for the purpose of economizing in wall space and also for the purpose of providing a means of insulating the woodwork of the walls against the heat of the hotair pipes. lVhere the hot air pipes are so enclosed hot air registers 51 will be fitted into branch headers 52, which extend from the hot air pipes 49 to the face of the cold air pipe 50 and cold air registers 53 will be fitted to the cold air pipes 50 preferably below the hot air registers 51. According to the preferred form of the invention the cold air descending through the cold air pipes 50 is brought into a cold air manifold 54 suspended from the furnace room ceiling, which manifold is provided with a fresh air pas "age 55 having an inlet opening 56 at any suitable point exterior of the building, fitted with an inlet door 57 so that the flow of air through the passage 55 is controlled. Outlet openings 58 are formed in the bottom wall of themanifold to discharge the air received therein into the furnace room. Further cold air pipes 59 may be fitted if desired, which communicate directly with the furnace room through a bell shaped outlet funnel 60 having a control damper 61. lVitha view to obtaining the fullest output of hot air from the fuel consumed, I may provide a half pipe or saddle 62 over and spaced from the smoke pipe 41, which communicates with one of the hot air pipes 49 through a vertical pipe 63 so that air from the furnace roonrcoming into contact with the adjacent portion of the smoke pipe 41 will be heated thereby and caused to flow through the pipes 63 and 49 to perform useful work in heating the build- Cold air is drawn from the furnace room into the furnace casing through an opening 64. Fitted into the cold air passage 55 is a water supply pipe 65 having a plurality of ets66 from which water is sprayed between a series of baffle plates 67 into a water tray 68, the baffle plates being so arranged that the air flowing through the passage is caused to pass through the water spray so that all solids are washed therefrom and the air purified before being discharged into the furnace room through the openings 58. A pipe 69 conducts the overflow from the tray to a tank 70 which is disposed immediately above the radiator 5 of the furnace, so that the heat therefrom will cause a rapid evaporation of the water, whereby the heated air passing upwards through the hot air pipes 49 may become impregnated with moist vapour. A pipe 71 conducts the surplus water from the tank 70 and delivers it through a header 72 having plurality of jets 73 in spray form across the cold air inlet opening 64 of the furnace casing, thus washing the air returned to the furnace casing 38. The water from thejets 73 is received in a tray 7 4 from which it is led to a suitable drain. g

What I claim as my invention is; 1. In a hot air furnace having a dome,

a radiator comprising a cylindrical chamber supported upon the dome and communi-c' eating with an annular chamber having a smoke outlet, and separate means of commun cation between the dome and the cylindrical chamber and between the dome and the annular passage.

2. In a hot air furnace radiator comprising a cylindrical chamber supported upon the dome and communicating with an annular chamber having a smoke outlet, separate means of communication between the dome and the cylindrical chamber and between the dome and the annular passage, and a means for admitting outside air to the communicating means between the dome and the cylindrical chamber.

3. In a hot air furnace, the combination of a fire pot, a dome surmounting the fire pot and having an openingformed in' the upper wall thereof, a. radiator having a 'central cylindrical chamber-covering the opening in the dome and communicating with the interior of said dome and: an annular radiator passage surrounding said chamber and directly communicating therewith at one point only, a conduit directly connecting said annular radiator passage with an opening formed in the side of said dome, a partition wall blocking the annular radiator passage at one side of'said conduit, a smoke pipe communicating with said annular passage at the side of the partition wall remote from said conduit, a combustion chamber communicating with said conduit and a liquid fuel burner mounted in said combustion chamber.

4. The combination with the structure recited in claim 3 of air supplying rings mounted respectively within the aforementioned top and side openings of the dome.

5. The combination with the'structure recited in claim' 3 of a verticallyextending casing provided with a bottom outlet and having its upper end connected to the smoke pipe in proximity to the point of connection between the smoke pipe and the annular radiator passage, a vertically disposed dividing plate mounted in said casing to provide having a dome, a

down and up draft passages, a dampermovably mounted in the smoke pipe and adapted in one position, to vengage the upper end of said dividing plate to block that portion of the smoke passage directly above the dividing plate, a branch connection between the bottom outlet of the casing and the smoke pipe, and a damper mounted in said branch connection and controlling communication between the smoke pipe and the casing.

6. In a hot air furnace having a casing enclosing a fire pot, a dome and a radiator comprising a cylindrical chamber communieating with anannular passage leading to a smoke pipe, a smoke manifold communicating between the dome and the annular passage and means exterior of the fire pot for supplying a flow of heat through the manifold and the radiator.

7. In a, hot air furnace having a casing enclosing a fire pot, a dome and a radiator, said radiator comprising a cylindrical chamber in communicationwith an annular passage leading to a smoke pipe, a smoke manifold communicating between the dome and the annular passage, a combustion chamber communicating with a. smoke manifold and an auxiliary burner in the combustion chamber for supplying a flow of heat through the manifold and the radiator to the smoke pipe. Dated at Vancouver, B. C., this 10th day of March, 1927.

LOUIS SKELDING. 

